Touch input device for detecting touch pressure

ABSTRACT

A touch input device may be provided which includes at least one cover and a display module disposed under the cover, and detects a pressure of a touch input to the cover. The touch input device includes: a housing which includes a bottom plate on which a battery and a mainboard are disposed; and a mid-frame which is disposed within the housing, is disposed under the display module, and is disposed on the battery and on the mainboard. The mid-frame includes a guide member which is disposed on a bottom surface of the mid-frame and is coupled to the bottom plate of the housing.

CROSS-REFERENCE TO RELATED PATENT APPLICATIONS

The present application is a U.S. national stage application under 35 U.S.C. § 371 of PCT Application No. PCT/KR2017/005441, filed May 25, 2017, which claims priority to Korean Patent Application No. 1020160065687, filed May 27, 2016. The disclosures of the aforementioned priority applications are incorporated herein by reference in their entireties.

TECHNICAL FIELD

The present disclosure relates to a touch input device which detects a touch pressure.

BACKGROUND ART

Various kinds of input devices are being used to operate a computing system. For example, the input device includes a button, key, joystick and touch screen. Since the touch screen is easy and simple to operate, the touch screen is increasingly being used to operate the computing system.

The touch screen may constitute a touch surface of a touch input device including a touch sensor panel which may be a transparent panel including a touch-sensitive surface. The touch sensor panel is attached to the front side of a display screen, and then the touch-sensitive surface may cover the visible side of the display screen. The touch screen allows a user to operate the computing system by simply touching the touch screen by a finger, etc. Generally, the computing system recognizes the touch and a position of the touch on the touch screen and analyzes the touch, and thus, performs operations in accordance with the analysis.

Meanwhile, various types and shapes of display panels can be used in the touch screen. Therefore, the touch input device capable of efficiently detecting the touch position and touch pressure is increasingly required as the touch input device including the various types and shapes of display panels.

DISCLOSURE Technical Problem

The object of the present invention is to provide a touch input device capable of maintaining a constant pressure sensing sensitivity even though an external force is applied.

Also, the object of the present invention is to provide the touch input device capable of reducing or preventing the deformation of a mid-frame by reinforcing the strength of the mid-frame.

Also, the object of the present invention is to provide the touch input device capable of reducing or preventing the movement of the mid-frame within a housing.

Technical Solution

One embodiment is a touch input device which includes at least one cover and a display module disposed under the cover, and detects a pressure of a touch input to the cover. The touch input device includes: a housing which includes a bottom plate on which a battery and a mainboard are disposed; and a mid-frame which is disposed within the housing, is disposed under the display module, and is disposed on the battery and on the mainboard. The mid-frame includes a guide member which is disposed on a bottom surface of the mid-frame and is coupled to the bottom plate of the housing.

The bottom plate of the housing may have a groove, and the guide member of the mid-frame may include a protrusion that is insertable into the groove.

The guide member of the mid-frame may have a groove, and the bottom plate of the housing may include a protrusion which is insertable into the groove.

The touch input device may further include a coupling member which passes through the bottom plate of the housing and is embedded in the guide member of the mid-frame to a predetermined depth.

The guide member of the mid-frame and the bottom plate of the housing may have a groove, and the touch input device may further include a coupling member which is insertable into the groove of the guide member and the groove of the bottom plate.

The guide member of the mid-frame and the bottom plate of the housing may have a groove, and the touch input device may further include an adhesive agent or an adhesive tape which is disposed in the groove of the guide member and the groove of the bottom plate.

Another embodiment is a touch input device which includes at least one cover and a display module disposed under the cover, and detects a pressure of a touch input to the cover. The touch input device includes: a housing which includes a bottom plate on which a battery and a mainboard are disposed; and a mid-frame which is disposed within the housing, is disposed under the display module, and is disposed on the battery and on the mainboard. The housing includes a guide member which is disposed on a top surface of the bottom plate of the housing and is coupled to the mid-frame.

A bottom plate of the mid-frame may have a groove, and the guide member of the housing may include a protrusion that is insertable into the groove.

The guide member of the housing may have a groove, and a bottom plate of the mid-frame may include a protrusion that is insertable into the groove.

The touch input device may further include a coupling member which passes through the bottom plate of the housing and the guide member of the housing and is embedded in the mid-frame to a predetermined depth.

The touch input device may further include a coupling member which passes through the mid-frame and is embedded in the guide member of the housing to a predetermined depth.

The guide member of the housing and the mid-frame may have a groove, and the touch input device may further include a coupling member which is insertable into the groove of the guide member and the groove of the mid-frame.

The guide member of the housing and the mid-frame may have a groove, and the touch input device may further include an adhesive agent or an adhesive tape which is disposed in the groove of the guide member and the groove of the mid-frame.

Further another embodiment is a touch input device which includes at least one cover and a display module disposed under the cover, and detects a pressure of a touch input to the cover. The touch input device includes: a housing which includes a bottom plate on which a battery and a mainboard are disposed; and a mid-frame which is disposed within the housing, is disposed under the display module, and is disposed on the battery and on the mainboard. The mid-frame includes a guide member which is disposed on a bottom surface of the mid-frame. The housing includes a guide member which is disposed on a top surface of the bottom plate of the housing and is coupled to the guide member of the mid-frame.

The guide member of the mid-frame may have a groove, and the guide member of the housing may include a protrusion that is insertable into the groove.

The guide member of the housing may have a groove, and the guide member of the mid-frame may include a protrusion that is insertable into the groove.

The touch input device may further include a coupling member which passes through the bottom plate of the housing and the guide member of the housing and is embedded in the guide member of the mid-frame to a predetermined depth.

The touch input device may further include a coupling member which passes through the guide member of the mid-frame and is embedded in the guide member of the housing to a predetermined depth.

The guide member of the housing and the guide member of the mid-frame may have a groove. The touch input device may further include a coupling member which is insertable into the groove of the guide member of the housing and the groove of the guide member of the mid-frame.

The guide member of the housing and the guide member of the mid-frame may have a groove, and the touch input device may further include an adhesive agent or an adhesive tape which is disposed in the groove of the guide member of the housing and the groove of the guide member of the mid-frame.

The housing may further include a side plate extending from the bottom plate. An inner surface of the side plate may include a stepped surface supporting both ends of the mid-frame. The touch input device may further include a coupling member which passes through both ends of the mid-frame and is embedded in the stepped surface.

The housing may further include a side plate extending from the bottom plate. An inner surface of the side plate may include a stepped surface supporting both ends of the mid-frame. The touch input device may further include a coupling member which passes through the side plate and is embedded in both ends of the mid-frame.

Both ends of the mid-frame may be upwardly or downwardly bent.

The touch input device may further include a side plate extending from the bottom plate. An inner surface of the side plate may include a stepped surface supporting both ends of the mid-frame. The touch input device may further include a coupling member which passes through both ends of the mid-frame and is embedded in the side plate.

Both ends of the mid-frame may be upwardly or downwardly bent.

The mid-frame may further include an edge guide member which is disposed on an edge of the bottom surface of the mid-frame, and the edge guide member may be coupled to the bottom plate of the housing.

Advantageous Effects

According to the touch input device having the above-described configuration in accordance with the embodiment of the present invention can maintain a constant pressure sensing sensitivity even though an external force is applied.

Also, the touch input device can reduce or prevent the deformation of a mid-frame by reinforcing the strength of the mid-frame.

Also, the touch input device can reduce or prevent the movement of the mid-frame within a housing.

DESCRIPTION OF DRAWINGS

FIG. 1 is a view for describing a configuration and an operation of a touch sensor panel which is a component of a touch input device according to an embodiment of the present invention;

FIG. 2 shows a configuration of the touch input device according to the embodiment of the present invention;

FIG. 3 is a view for describing a touch pressure detection method and shows a configuration of a pressure sensor according to the embodiment of the present invention;

FIGS. 4a to 4f are cross sectional views of the pressure sensor of the touch input device according to various embodiment of the present invention;

FIG. 5a is a cross sectional view of the touch input device according to another embodiment of the present invention;

FIG. 5b is a cross sectional view of the touch input device according to further another embodiment of the present invention;

FIG. 5c is a cross sectional view of the touch input device according to yet another embodiment of the present invention;

FIG. 6 is a cross sectional view of the touch input device according to still another embodiment of the present invention;

FIG. 7a is a cross sectional view of the touch input device according to still another embodiment of the present invention;

FIG. 7b is a cross sectional view of the touch input device according to still another embodiment of the present invention;

FIG. 8 is a cross sectional view of the touch input device according to still another embodiment of the present invention;

FIG. 9 is a cross sectional view of the touch input device according to still another embodiment of the present invention;

FIG. 10 is a cross sectional view of the touch input device according to still another embodiment of the present invention;

FIG. 11 is a cross sectional view of the touch input device according to still another embodiment of the present invention;

FIG. 12 is a cross sectional view of the touch input device according to still another embodiment of the present invention;

FIGS. 13a to 13d are cross sectional views of the touch input device according to still another embodiment of the present invention;

FIGS. 14a to 14e are cross sectional views of the touch input device according to still another embodiment of the present invention;

FIGS. 15a to 15d are cross sectional views of the touch input device according to still another embodiment of the present invention;

FIG. 16 is a view for describing an example of a coupling structure between a mid-frame 1091 and a housing 1080 shown in FIGS. 5a to 15;

FIG. 17 is a view for describing another example of the coupling structure between the mid-frame 1091 and the housing 1080 shown in FIGS. 5a to 15;

FIG. 18 is a view for describing further another example of the coupling structure between the mid-frame 1091 and the housing 1080 shown in FIGS. 5a to 15;

FIG. 19 is a view for describing yet another example of the coupling structure between the mid-frame 1091 and the housing 1080 shown in FIGS. 5a to 15;

FIG. 20 is a view for describing still another example of the coupling structure between the mid-frame 1091 and the housing 1080 shown in FIGS. 5a to 15;

FIG. 21 is a view for describing still another example of the coupling structure between the mid-frame 1091 and the housing 1080 shown in FIGS. 5a to 15;

FIG. 22 is a view for describing a modified example of the coupling structure between the mid-frame 1091 and the housing 1080 shown in FIG. 21;

FIG. 23 is a view for describing a modified example of the coupling structure between the mid-frame 1091 and the housing 1080 shown in FIG. 22;

FIG. 24 is a view for describing still another example of the coupling structure between the mid-frame 1091 and the housing 1080 shown in FIGS. 5a to 15;

FIG. 25a is a view for describing still another example of the coupling structure between the mid-frame 1091 and the housing 1080 shown in FIGS. 5a to 15;

FIG. 25b is a view for describing a modified example of the coupling structure between the mid-frame 1091 and the housing 1080 shown in FIG. 25 a;

FIG. 25c is a view for describing a modified example of the coupling structure between the mid-frame 1091 and the housing 1080 shown in FIG. 25 a;

FIG. 25d is a view for describing a modified example of the coupling structure between the mid-frame 1091 and the housing 1080 shown in FIG. 25 b;

FIGS. 26 to 27 are front views of the mid-frame 1091 shown in FIGS. 5a to 15a as viewed from the bottom;

FIG. 28 shows a modified example of FIG. 26 and is a front view of the mid-frame 1091 shown in FIGS. 5a to 15a as viewed from the bottom;

FIG. 29 shows a modified example through the combination of FIG. 27 and FIG. 28 and is a front view of the mid-frame 1091 shown in FIGS. 5a to 15a as viewed from the bottom; and

FIG. 30 shows a modified example of the touch input device shown in FIG. 5 a.

MODE FOR INVENTION

Specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. The specific embodiments shown in the accompanying drawings will be described in enough detail that those skilled in the art are able to embody the present invention. Other embodiments other than the specific embodiments are mutually different, but do not have to be mutually exclusive. Additionally, it should be understood that the following detailed description is not intended to be limited.

The detailed descriptions of the specific embodiments shown in the accompanying drawings are intended to be read in connection with the accompanying drawings, which are to be considered part of the entire written description. Any reference to direction or orientation is merely intended for convenience of description and is not intended in any way to limit the scope of the present invention.

Specifically, relative terms such as “lower,” “upper,” “horizontal,” “vertical,” “above,” “below,” “up,” “down,” “top” and “bottom” as well as derivative thereof (e.g., “horizontally,” “downwardly,” “upwardly,” etc.) should be construed to refer to the orientation as then described or as shown in the drawing under discussion. These relative terms are for convenience of description only and do not require that the apparatus be constructed or operated in a particular orientation.

In description of embodiments of the present invention, when it is mentioned that an element is formed “on” or “under” another element, it means that the mention includes a case where two elements are formed directly contacting with each other or are formed such that at least one separate element is interposed between the two elements. The “on” and “under” will be described to include the upward and downward directions based on one element.

Terms such as “attached,” “affixed,” “connected,” “coupled,” “interconnected,” and similar refer to a relationship wherein structures are attached, connected or fixed to one another either directly or indirectly through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise.

Hereinafter, a touch input device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The touch input device according to the embodiment of the present invention, which includes a display module and is capable of detecting a pressure, can be used not only in a portable electronic product such as a smartphone, smartwatch, tablet PC, laptop computer, personal digital assistant (PDA), MP3 player, camera, camcorder, electronic dictionary, etc., but also in an electric home appliance such as a home PC, TV, DVD, refrigerator, air conditioner, microwave, etc. Also, the touch pressure detectable touch input device including a display module in accordance with the embodiment of the present invention can be used without limitation in all of the products requiring a device for display and input such as an industrial control device, a medical device, etc.

FIG. 1 is a view for describing a configuration and an operation of a capacitance type touch sensor panel 100 included in the touch input device according to the embodiment of the present. Referring to FIG. 1, the touch sensor panel 100 may include a plurality of drive electrodes TX1 to TXn and a plurality of receiving electrodes RX1 to RXm, and may include a drive unit 120 which applies a drive signal to the plurality of drive electrodes TX1 to TXn for the purpose of the operation of the touch sensor panel 100, and a sensing unit 110 which detects the touch and the touch position by receiving a sensing signal including information on a capacitance change amount changing according to the touch on the touch surface of the touch sensor panel 100.

As shown in FIG. 1, the touch sensor panel 100 may include the plurality of drive electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm. FIG. 1 shows that the plurality of drive electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm of the touch sensor panel 100 form an orthogonal array. However, the present invention is not limited to this. The plurality of drive electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm have an array of arbitrary dimension, for example, a diagonal array, a concentric array, a 3-dimensional random array, etc., and an array obtained by the application of them. Here, “n” and “m” are positive integers and may be the same as each other or may have different values. The magnitude of the value may be changed depending on the embodiment.

As shown in FIG. 1, the plurality of drive electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm may be arranged to cross each other. The drive electrode TX may include the plurality of drive electrodes TX1 to TXn extending in a first axial direction. The receiving electrode RX may include the plurality of receiving electrodes RX1 to RXm extending in a second axial direction crossing the first axial direction.

In the touch sensor panel 100 according to the embodiment of the present invention, the plurality of drive electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm may be formed in the same layer. For example, the plurality of drive electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm may be formed on the same side of an insulation layer (not shown). Also, the plurality of drive electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm may be formed in the different layers. For example, the plurality of drive electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm may be formed on both sides of one insulation layer (not shown) respectively, or the plurality of drive electrodes TX1 to TXn may be formed on a side of a first insulation layer (not shown) and the plurality of receiving electrodes RX1 to RXm may be formed on a side of a second insulation layer (not shown) different from the first insulation layer.

The plurality of drive electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm may be made of a transparent conductive material (for example, indium tin oxide (ITO) or antimony tin oxide (ATO) which is made of tin oxide (SnO₂), and indium oxide (In₂O₃), etc.), or the like. However, this is only an example. The drive electrode TX and the receiving electrode RX may be also made of another transparent conductive material or an opaque conductive material. For instance, the drive electrode TX and the receiving electrode RX may be formed to include at least any one of silver ink, copper, nano silver, or carbon nanotube (CNT). Also, the drive electrode TX and the receiving electrode RX may be made of metal mesh.

The drive unit 120 according to the embodiment may apply a drive signal to the drive electrodes TX1 to TXn. In the embodiment, one drive signal may be sequentially applied at a time to the first drive electrode TX1 to the n-th drive electrode TXn. The drive signal may be applied again repeatedly. This is only an example. The drive signal may be applied to the plurality of drive electrodes at the same time in accordance with the embodiment.

Through the receiving electrodes RX1 to RXm, the sensing unit 110 receives the sensing signal including information on a capacitance (Cm) 101 generated between the receiving electrodes RX1 to RXm and the drive electrodes TX1 to TXn to which the drive signal has been applied, thereby detecting whether or not the touch has occurred and where the touch has occurred. For example, the sensing signal may be a signal coupled by the capacitance (CM) 101 generated between the receiving electrode RX and the drive electrode TX to which the drive signal has been applied. As such, the process of sensing the drive signal applied from the first drive electrode TX1 to the n-th drive electrode TXn through the receiving electrodes RX1 to RXm can be referred to as a process of scanning the touch sensor panel 100.

For example, the sensing unit 110 may include a receiver (not shown) which is connected to each of the receiving electrodes RX1 to RXm through a switch. The switch becomes the on-state in a time interval during which the signal of the corresponding receiving electrode RX is detected, thereby allowing the receiver to detect the sensing signal from the receiving electrode RX. The receiver may include an amplifier (not shown) and a feedback capacitor coupled between the negative (−) input terminal of the amplifier and the output terminal of the amplifier, i.e., coupled to a feedback path. Here, the positive (+) input terminal of the amplifier may be connected to the ground. Also, the receiver may further include a reset switch which is connected in parallel with the feedback capacitor. The reset switch may reset the conversion from current to voltage that is performed by the receiver. The negative input terminal of the amplifier is connected to the corresponding receiving electrode RX and receives and integrates a current signal including information on the capacitance (CM) 101, and then converts the integrated current signal into voltage. The sensing unit 110 may further include an analog to digital converter (ADC) (not shown) which converts the integrated data by the receiver into digital data. Later, the digital data may be input to a processor (not shown) and processed to obtain information on the touch on the touch sensor panel 100. The sensing unit 110 may include the ADC and processor as well as the receiver.

A controller 130 may perform a function of controlling the operations of the drive unit 120 and the sensing unit 110. For example, the controller 130 generates and transmits a drive control signal to the drive unit 120, so that the drive signal can be applied to a predetermined drive electrode TX1 for a predetermined time period. Also, the controller 130 generates and transmits the drive control signal to the sensing unit 110, so that the sensing unit 110 may receive the sensing signal from the predetermined receiving electrode RX for a predetermined time period and perform a predetermined function.

In FIG. 1, the drive unit 120 and the sensing unit 110 may constitute a touch detection device (not shown) capable of detecting whether the touch has occurred on the touch sensor panel 100 or not and where the touch has occurred. The touch detection device may further include the controller 130. The touch detection device may be integrated and implemented on a touch sensing integrated circuit IC in a touch input device 1000 including the touch sensor panel 100. The drive electrode TX and the receiving electrode RX included in the touch sensor panel 100 may be connected to the drive unit 120 and the sensing unit 110 included in touch sensing IC 150 through, for example, a conductive trace and/or a conductive pattern printed on a circuit board, or the like. The touch sensing IC 150 may be placed on a circuit board on which the conductive pattern has been printed, for example, a first printed circuit board (hereafter, referred to as a first PCB). According to the embodiment, the touch sensing IC 150 may be mounted on a main board for operation of the touch input device 1000.

As described above, a capacitance (C) with a predetermined value is formed at each crossing of the drive electrode TX and the receiving electrode RX. When an object such as a finger approaches close to the touch sensor panel 100, the value of the capacitance may be changed. In FIG. 1, the capacitance may represent a mutual capacitance (Cm). The sensing unit 110 detects such electrical characteristics, thereby detecting whether the touch has occurred on the touch sensor panel 100 or not and where the touch has occurred. For example, the sensing unit 110 is able to detect whether the touch has occurred on the surface of the touch sensor panel 100 comprised of a two-dimensional plane consisting of a first axis and a second axis.

More specifically, when the touch occurs on the touch sensor panel 100, the drive electrode TX to which the drive signal has been applied is detected, so that the position of the second axial direction of the touch can be detected. Likewise, when the touch occurs on the touch sensor panel 100, the capacitance change is detected from the reception signal received through the receiving electrode RX, so that the position of the first axial direction of the touch can be detected.

The foregoing has described in detail the mutual capacitance type touch sensor panel as the touch sensor panel 100. However, in the touch input device 1000 according to the embodiment of the present invention, the touch sensor panel 100 for detecting whether or not the touch has occurred and the touch position may be implemented by using not only the above-described method but also any touch sensing method such as a self-capacitance type method, a surface capacitance type method, a projected capacitance type method, a resistance film method, a surface acoustic wave (SAW) method, an infrared method, an optical imaging method, a dispersive signal technology, and an acoustic pulse recognition method, etc.

In the touch input device 1000 to which a pressure sensor according to the embodiment can be applied, the touch sensor panel 100 for detecting the touch position may be positioned outside or inside the display module 200.

The display module included in the display module 200 of the touch input device 1000 to which the pressure sensor according to the embodiment can be applied may be an organic light emitting diode (OLED). The OLED may be an AM-OLED or PM-OLED.

However, the display module 200 of the touch input device 1000 according to the embodiment is not limited to this. The display module 200 may be another type of module capable of displaying such as liquid crystal display (LCD), a plasma display panel (PDP), etc.

Accordingly, a user may perform the input operation by touching the touch surface while visually identifying an image displayed on the display module. Here, the display module 200 may include a control circuit which receives an input from an application processor (AP) or a central processing unit (CPU) on a main board for the operation of the touch input device 1000 and displays the contents that the user wants on the display module. This control circuit may be mounted on a second printed circuit board (not shown). Here, the control circuit for the operation of the display module may include a display module control IC, a graphic controller IC, and other circuits required to operate the display module.

Following the above description of the operation of the touch sensor panel 100 which detects the touch position, a method and principle of detecting the touch pressure will be described with reference to FIGS. 2 to 3.

FIG. 2 shows a configuration of the touch input device 1000 according to the embodiment of the present invention. FIG. 3 shows a touch pressure detection method and various embodiments of a pressure sensor 400 for the same.

As shown in FIG. 2, the touch input device 1000 according to the embodiment of the present invention includes the touch sensor panel 100, the display module 200, the pressure sensor 400, and a mid-frame 300. Here, the mid-frame 300 may be a reference potential layer. The reference potential layer of the touch input device 1000 according to another embodiment of the present invention may be arranged differently from the arrangement of FIG. 2. That is, the reference potential layer may be located on the pressure sensor 400 or may be located within the display module 200. Also, one or more reference potential layers may be provided. Here, the pressure sensor 400 may be disposed differently in response to the stack structure of the touch input device 1000. This will be described in detail in the description of the embodiment of FIG. 3.

FIG. 3 shows specifically the electrode arrangement of the pressure sensor 400 of the touch input device 1000 according to the embodiment of the present invention. In the electrode arrangement shown in FIG. 3, the pressure electrodes 450 and 460 may be located between the display module 200 and the mid-frame 300 and may be disposed closer to the display module 200. Specifically, the pressure electrodes 450 and 460 may be disposed on the bottom surface of the display module 200.

However, unlike the embodiment of FIG. 3, it can be also considered that the pressure electrodes 450 and 460 are formed on the lower surface of the display module 200. Here, the lower surface of the display module 200 may be the bottom surface of the display module 200 or may be any one surface of the lower portion of the display module 200.

The mid-frame 300 is the reference potential layer and may have a ground potential. Therefore, a distance “d” between the mid-frame 300 and the pressure electrodes 450 and 460 is reduced by the touch on the touch surface of the touch sensor panel 100. This causes the change of the mutual capacitance between the first electrode 450 and the second electrode 460.

When an object 500 applies a pressure to the surface of the touch sensor panel 100 shown in FIG. 2, the touch sensor panel 100 and the display module 200 shown in FIG. 2 may be bent. Accordingly, the distance “d” between the mid-frame 300 and the first electrode 450 and between the mid-frame 300 and the second electrode 460. In this case, due to the reduction of the distance “d”, the mutual capacitance between the first electrode 450 and the second electrode 460 may be reduced. Thus, the reduced amount of the mutual capacitance is detected from the sensing signal obtained through the receiving electrode, so that the magnitude of the touch pressure can be calculated.

FIGS. 4a to 4f show structural cross sections of the pressure sensor 400 of the touch input device 1000 according to various embodiment of the present invention.

As shown in FIG. 4a , in the pressure sensor 400, the pressure electrodes 450 and 460 are located between a first insulation layer 410 and a second insulation layer 411. For example, the pressure electrodes 450 and 460 may be formed on the first insulation layer 410, and then may be covered with the second insulation layer 411. Here, the first insulation layer 410 and the second insulation layer 411 may be made of an insulating material such as a polyimide. The first insulation layer 410 may be polyethylene terephthalate (PET) and the second insulation layer 411 may be a cover layer made of ink. The pressure electrodes 450 and 460 may include a material such as copper or aluminum. According to the embodiment, by a bond (not shown) such as a liquid bond, the first insulation layer 410 and the second insulation layer 411 may be bonded to each other, and the first insulation layer 410 and the pressure electrodes 450 and 460 may be bonded to each other. Also, according to the embodiment, the pressure electrodes 450 and 460 may be formed by positioning a mask, which has a through-hole corresponding to a pressure electrode pattern, on the first insulation layer 470, and then by spraying a conductive material. Also, the pressure electrodes 450 and 460 may be printed on the first insulation layer 410 by a gravure printing method using a roller.

In FIG. 4a , the pressure sensor 400 may further include an elastic foam 440. The elastic foam 440 may be formed on a side of the second insulation layer 411 in such a manner as to be opposite to the first insulation layer 410. Later, when the pressure sensor 400 is disposed on the mid-frame 300, the elastic foam 440 may be disposed on the mid-frame 300 side with respect to the second insulation layer 411.

Here, in order to attach the pressure sensor 400 to the mid-frame 300, an adhesive tape 430 having a predetermined thickness may be formed on the outskirt of the elastic foam 440. According to the embodiment, the adhesive tape 430 may be a double adhesive tape. Here, the adhesive tape 430 may also function to adhere the elastic foam 440 to the second insulation layer 411. Here, the adhesive tape 430 is disposed on the outskirt of the elastic foam 440, so that the thickness of the pressure sensor 400 can be effectively reduced.

When the pressure sensor 400 shown in FIG. 4a is disposed on the mid-frame 300, the pressure electrodes 450 and 460 may operate to detect the pressure. For instance, the pressure electrodes 450 and 460 is disposed on the display module 200 side. The reference potential layer may correspond to the mid-frame 300, and the elastic foam 440 may perform operations corresponding to the spacer layer 420. For example, when the top of the touch input device 1000 is touched, the elastic foam 440 is pressed and the distance between the mid-frame 300, i.e., the reference potential layer and the pressure electrodes 450 and 460 is reduced. As a result, the mutual capacitance between the first electrode 405 and the second electrode 460 may be reduced. Through such a change of the capacitance, the magnitude of the touch pressure can be detected.

Unlike FIG. 4a , the pressure sensor 400 may not be attached to the mid-frame 300 through the adhesive tape 430 disposed on the outskirt of the elastic foam 440. In FIG. 4b , a first adhesive tape 431 for adhering the elastic foam 440 to the second insulation layer 411 and a second adhesive tape 432 for adhering the pressure sensor 400 to the mid-frame 300 are included on the elastic foam 440. As such, the first adhesive tape 431 and the second adhesive tape 432 are disposed, so that the elastic foam 440 can be securely attached to the second insulation layer 411 and the pressure sensor 400 can be securely attached to the mid-frame 300. According to the embodiment, the pressure sensor 400 shown in FIG. 4b may not include the second insulation layer 411. For example, the first adhesive tape 431 may not only function as a cover layer covering directly the pressure electrodes 450 and 460 but also function to attach the elastic foam 440 to the first insulation layer 410 and the pressure electrodes 450 and 460. This can be applied to the following FIGS. 4c to 4 f.

FIG. 4c shows a modified example of the structure shown in FIG. 4a . In FIG. 4c , a hole “H” extending through the elastic foam 440 is formed in the elastic foam 440, thereby causing the elastic foam 440 to be well pressed by the touch on the touch input device 1000. The hole “H” may be filled with air. When the elastic foam 440 is well pressed, the sensitivity for the pressure detection can be improved. Also, the hole “H” formed in the elastic foam 440 makes it possible to prevent the surface of the elastic foam 440 from protruding due to the air at the time of attaching the pressure sensor 400 to the mid-frame 300, etc. In FIG. 4c , for the purpose of securely attaching the elastic foam 440 to the second insulation layer 411, the first adhesive tape 431 as well as the adhesive tape 430 may be further included.

FIG. 4d shows a modified example of the structure shown in FIG. 4b . As with FIG. 4c , the hole “H” extending through the height of the elastic foam 440 is formed in the elastic foam 440.

FIG. 4e shows a modified example of the structure shown in FIG. 4b . A second elastic foam 441 may be further included on one side of the first insulation layer 410, that is, the opposite side to the elastic foam 440. The second elastic foam 441 may be further formed in order to minimize the impact transmitted to the display module 200 when the pressure sensor 400 is later attached to the touch input device 1000. Here, a third adhesive layer 433 for adhering the second elastic foam 441 to the first insulation layer 410 may be further included.

FIG. 4f shows a structure of the pressure sensor 400 capable of operating to detect the pressure. FIG. 4f shows the structure of the pressure sensor 400, in which the first electrodes 450 and 451 and the second electrodes 460 and 461 are disposed with the elastic foam 440 placed therebetween. Similarly to the structure described with reference to FIG. 4b , the first electrodes 450 and 451 may be formed between the first insulation layer 410 and the second insulation layer 411, and the first adhesive tape 431, the elastic foam 440, and the second adhesive tape 432 may be formed. The second electrodes 460 and 461 may be formed between a third insulation layer 412 and a fourth insulation layer 413, and the fourth insulation layer 413 may be attached to one side of the elastic foam 440 by means of the second adhesive tape 432. Here, the third adhesive tape 433 may be formed on the substrate-side surface of the third insulation layer 412. The pressure sensor 400 may be attached to the mid-frame 300 by means of the third adhesive tape 433. As described with reference to FIG. 4b , according to the embodiment, the pressure sensor 400 shown in FIG. 4f may not include the second insulation layer 411 and/or the fourth insulation layer 413. For example, the first adhesive tape 431 may not only function as a cover layer covering directly the first electrodes 450 and 451 but also function to attach the elastic foam 440 to the first insulation layer 410 and the first electrodes 450 and 451. Also, the second adhesive tape 432 may not only function as a cover layer covering directly the second electrodes 460 and 461 but also function to attach the elastic foam 440 to the third insulation layer 412 and the second electrodes 460 and 461.

Here, the elastic foam 440 is pressed by the touch on the touch input device 1000, and thus, the mutual capacitance between the first electrodes 450 and 451 and the second electrodes 460 and 461. Through such a change of the capacitance, the touch pressure can be detected. Also, according to the embodiment, any one of the first electrodes 450 and 451 and the second electrodes 460 and 461 is maintained at the ground potential, and then the self-capacitance can be detected by the other electrode.

In FIG. 4f , although the thickness and manufacturing cost of the pressure sensor 400 are higher than those of a case where the electrode is formed as a single layer, it is ensured that a pressure detection performance is not changed according to the characteristics of the reference potential layer located outside the pressure sensor 400. That is, the pressure sensor 400 is formed as shown in FIG. 4f , an effect caused by an external potential (ground) environment can be minimized in the pressure detection. Therefore, regardless of the type of the touch input device 1000 to which the pressure sensor 400 is applied, the same pressure sensor 400 can be used.

In the foregoing, the pressure detection based on the mutual capacitance change amount which changes as the drive electrode and the receiving electrode become close to the reference potential layer has been described by using the pressure electrode including the drive electrode and the receiving electrode. However, the pressure sensor 400 according to the embodiment of the present invention is able to detect the touch pressure on the basis of the self-capacitance change amount.

Briefly describing, the touch pressure can be detected by using self-capacitance formed between the pressure electrode (the drive electrode or the receiving electrode may be used as the pressure electrode) and the reference potential layer. In other words, the touch pressure can be detected by using self-capacitance which is formed between the drive electrode and the reference potential layer and/or between the receiving electrode and the reference potential layer. When the touch pressure is not applied even by user's touch, the distance between the pressure electrode and the reference potential layer is not changed, so that the value of the self-capacitance is not changed. In this case, only the touch position by the touch sensor panel 100 would be detected. However, when even the touch pressure is applied, the value of the self-capacitance is changed in the above manner, and the pressure sensor 400 detects the touch pressure on the basis of the change amount of the self-capacitance.

Specifically, when the pressure is applied by the touch, the reference potential layer or the pressure electrode (the drive electrode or the receiving electrode may be used as the pressure electrode) moves, so that the distance between the reference potential layer and the pressure electrode is reduced and the value of the self-capacitance is increased. On the basis of the increased value of the self-capacitance, the touch pressure is detected by determining the magnitude of the touch pressure.

FIG. 5a is a cross sectional view of the touch input device according to another embodiment of the present invention.

Not only a mid-frame 1091 within which display modules 1010 and 1020 and a pressure sensor 1050 are mounted but also a battery 1060 supplying a driving electric power and a mainboard 1070 on which various components necessary for driving the device are mounted may be included within a housing 1080 of the touch input device.

The housing 1080 may be designated as a back cover.

In FIG. 5a , the mid-frame 1091 is spaced apart from the display modules 1010 and 1020 by a predetermined interval. An air-gap may be formed in the interval. However, there is no limitation to this. A predetermined cushion may be disposed in the interval.

FIG. 5a shows that the display modules 1010 and 1020 are LCDs. The display modules 1010 and 1020 include the LCD module 1010 and the backlight unit 1020 and are received within the mid-frame 1091. Meanwhile, a cover 1000 may be formed on the display surface of the display modules 1010 and 1020. The pressure sensor 1050 is provided under the backlight unit 1020.

Although FIG. 5a shows that a metal cover 1030 is disposed between the backlight unit 1020 and the pressure sensor 1050, the metal cover 1030 may be omitted in another embodiment. Here, the metal cover 1030 may be designated as a steel use stainless (SUS).

The metal cover 1030 may function to firmly fix or protect the display modules 1010 and 1020 and may function to shield electromagnetic waves. Therefore, it is desirable that the metal cover 1030 should be made of a metallic material having a predetermined rigidity capable of blocking an external impact.

The detailed configuration of the pressure sensor 1050 disposed under the display modules 1010 and 1020 is the same as that described above, the detailed description thereof will be omitted herein. The pressure electrode included in the pressure sensor 1050 is used to sense the capacitance change amount depending on the change of the distance between the pressure electrode and the reference potential layer. In the embodiment of FIG. 5a , the mid-frame 1091 disposed under the pressure sensor 1050 is used as the reference potential layer.

The mid-frame 1091 is spaced apart from the pressure sensor 1050 by a predetermined interval. When the distance between the pressure sensor 1050 and the mid-frame 1091 is reduced by the pressure applied by the touch of the object, the capacitance (self-capacitance or mutual capacitance) is changed and then the magnitude of the touch pressure can be detected on the basis of the change amount.

By reinforcing the strength of the mid-frame 1091, it is possible to constantly maintain the pressure sensing sensitivity even when an external force is applied to the touch input device. For example, when the user drops a smartphone, a tablet, or a phablet in which the touch input device is built and thus a predetermined external force is applied to the touch input device, the mid-frame 1091 may be deformed. Then, the distance between the mid-frame 1091, i.e., the reference potential layer and the pressure electrode included in the pressure sensor 1050 may become different from an initial distance at the time of release thereof. The pressure sensing sensitivity has been set to be constant through the initial calibration regardless of a position. Here, if the distance is changed, the pressure sensing sensitivity at a particular position may become different from the pressure sensing sensitivity at another position. The change of the pressure sensing sensitivity due to the external force can be reduced or prevented by reinforcing the strength of the mid-frame 1091. The detailed structure of the mid-frame 1091 will be described in detail below.

The mid-frame 1091 includes a top surface and a bottom surface thereof.

The pressure sensor 1050 is disposed above the top surface of the mid-frame 1091. The top surface of the mid-frame 1091 is spaced apart from the pressure sensor 1050 by a predetermined interval. The mid-frame 1091 may be used as the reference potential layer of the pressure electrode included in the pressure sensor 1050.

The battery 1060 and the mainboard 1070 are disposed under the bottom surface of the mid-frame 1091. A guide member 1091 a which guides the battery 1060 and the mainboard 1070 may be disposed on the bottom surface of the mid-frame 1091. The guide member 1091 a may be integrally formed with the bottom surface of the mid-frame 1091 or may be attached to the bottom surface of the mid-frame 1091. The guide member 1091 a, together with the bottom surface of the mid-frame 1091, may form a space for receiving the battery 1060 and the mainboard 1070. Since the movements of the battery 1060 and the mainboard 1070 are limited by the guide member 1091 a, it is possible to prevent the battery 1060 and the mainboard 1070 from deviating from their regular positions. Also, the guide member 1091 a can reduce the bending of the mid-frame 1091, which is caused by a predetermined force such as an external force by the user or external equipment, gravity, reaction by a momentary movement in a particular direction, etc. In other words, the guide member 1091 a can reinforce the strength of the mid-frame 1091.

When the guide member 1091 a reinforces the strength of the mid-frame 1091, the pressure sensing sensitivity of the touch input device can be constantly maintained. For example, in a case where the mid-frame 1091 is the reference potential layer of the pressure electrode included in the pressure sensor 1050, when the mid-frame 1091 is deformed by the external force, the distance between the pressure electrode and the mid-frame 1091 as the reference potential layer is changed, so that the pressure sensing sensitivity may be changed according to the position. By disposing the guide member 1091 a on the mid-frame 1091, it is possible to prevent the mid-frame 1091 from being deformed and to constantly maintain the pressure sensing sensitivity of the touch input device.

The guide member 1091 a can be coupled to the housing 1080. When the guide member 1091 a and the housing 1080 are coupled to each other, the mid-frame 1091 can be more firmly supported within the housing 1080, and it is possible to significantly reduce the bending of the mid-frame 1091, which is caused by a predetermined force such as an external force by the user or external equipment, gravity, reaction by momentary movement in a particular direction, etc.

The detailed embodiment of a coupling structure between the guide member 1091 a and the housing 1080 will be described with reference to later FIGS. 16 to 30.

The mid-frame 1091 may support the cover 1000. Both ends of the mid-frame 1091 may support the cover 1000. Both ends of the mid-frame 1091 may include an inner surface and an outer surface. The inner surface of the both ends of the mid-frame 1091 may be disposed apart from the sides of the display modules 1010 and 1020 and the pressure sensor 1050 by a predetermined interval. The outer surface of the both ends of the mid-frame 1091 may be disposed to contact with the inner surface of the housing 1080 or may be disposed apart from the inner surface of the housing 1080 by a predetermined interval.

The mainboard 1070 may receive or fix various components (e.g., IC, etc.) necessary for driving the device equipped with the touch input device and may be made of a metallic material and be connected to the ground (GND). However, the material of the mainboard 1070 is not limited to the metallic material. The mainboard 1070 may have a variety of shapes and sizes according to the received components. In particular, the mainboard 1070 functions to shield various components received therein, thereby blocking the introduction of the internal signal and emission of the external signal.

FIG. 5b is a cross sectional view of the touch input device according to further another embodiment of the present invention.

The configuration of the touch input device shown in FIG. 5b is the same as the configuration of the touch input device shown in FIG. 5a , except for the positions of the pressure sensor 1050 and the metal cover 1030.

The difference will be described in detail. While the touch input device shown in FIG. 5a shows that the metal cover 1030 is disposed between the pressure sensor 1050 and the display modules 1010 and 1020, the touch input device shown in FIG. 5b shows that the metal cover 1030 is disposed between the pressure sensor 1050 and the mid-frame 1091. Alternatively, in the touch input device shown in FIG. 5b , the pressure sensor 1050 is disposed between the metal cover 1030 and the display modules 1010 and 1020.

Here, though not shown in a separate figure, the display modules 1010 and 1020 may be disposed apart from the pressure sensor 1050 by a predetermined interval. Specifically, the bottom surface of the backlight unit 1020 and the top surface of the pressure sensor 1050 may be disposed apart from each other. In this case, the pressure sensor 1050 may be disposed on the top surface of the metal cover 1030.

In FIG. 5b , the mid-frame 1091 is spaced apart from the display modules 1010 and 1020 by a predetermined interval. An air-gap may be formed in the interval. However, there is no limitation to this. A predetermined cushion may be disposed in the interval.

The pressure electrode included in the pressure sensor 1050 is used to sense the capacitance change amount depending on the change of the distance between the reference potential layer and the pressure electrode. In the embodiment of the FIG. 5b , the reference potential layer is disposed within the display modules 1010 and 1020.

FIG. 5c is a cross sectional view of the touch input device according to yet another embodiment of the present invention.

As compared with the touch input device shown in FIG. 5a , the touch input device shown in FIG. 5c further includes an outer cover 1000′ and the position of the pressure sensor 1050 is different. In the touch input device shown in FIG. 5c , the outer cover 1000′ is disposed at a predetermined distance on the cover 1000, and the pressure sensor 1050 is disposed on the bottom surface of the outer cover 1000′.

The touch input device shown in FIG. 5c may have a space 1100 formed between the pressure sensor 1050 and the cover 1000. For a modified example, a compression layer made of a predetermined material may be disposed in the space 1100.

FIG. 6 is a cross sectional view of the touch input device according to still another embodiment of the present invention.

Compared to the touch input device shown in FIG. 5a , the touch input device shown in FIG. 6 further includes an elastic member 1040. The remaining components are the same as those of the touch input device shown in FIG. 5 a.

The elastic member 1040 is disposed between the metal cover 1030 and the pressure sensor 1050.

The elastic member 1040 is located under the metal cover 1030. Such an elastic member 1040 absorbs the external impact and protects the components (particularly, the display module) within the touch input device. Therefore, it is desirable that the elastic member 1040 should be made of a material having an elasticity to absorb the impact. However, the metal cover 1030 and the elastic member 1040 may be omitted or may be replaced by another component having the same function as those of the metal cover 1030 and the elastic member 1040. Unlike FIG. 6, it can be considered that the positions of the metal cover 1030 and the elastic member 1040 are swapped. Also, the metal cover 1030 and the elastic member 1040 may be formed only on a portion of the lower area of the display module instead of the entire lower area of the display module. That is, the embodiment of the present invention is not limited to the positions, materials, and shapes of the metal cover 1030 and the elastic member 1040.

In FIG. 6, the mid-frame 1091 is spaced apart from the display modules 1010 and 1020 by a predetermined interval. An air-gap may be formed in the interval. However, there is no limitation to this. A predetermined cushion may be disposed in the interval.

The operation method is the same as that of the embodiment of FIG. 5a . That is, the touch pressure can be detected by using the mid-frame 1091 provided under the pressure sensor 1050 as the reference potential layer.

FIG. 7a is a cross sectional view of the touch input device according to still another embodiment of the present invention.

Referring to FIG. 7a , a display module 1015 shown in FIG. 7a may include an OLED module, in particular an AM-OLED module. The remaining components are the same as those of the touch input device shown in FIG. 5 a.

The OLED module is a self-light emitting display module using a principle in which when a current flows through a fluorescent or phosphorescent organic thin film and then electrons and electron holes are combined in an organic material layer, so that light is generated. The organic matter constituting the light emitting layer determines the color of the light.

Specifically, the OLED uses a principle in which when electricity flows and an organic matter is applied on glass or plastic, the organic matter emits light. That is, the principle is that electron holes and electrons are injected into the anode and cathode of the organic matter respectively and are recombined in the light emitting layer, so that a high energy exciton is generated and the exciton releases the energy while falling down to a low energy state and then light with a particular wavelength is generated. Here, the color of the light is changed according to the organic matter of the light emitting layer.

The OLED includes a line-driven passive-matrix organic light-emitting diode (PM-OLED) and an individual driven active-matrix organic light-emitting diode (AM-OLED) in accordance with the operating characteristics of a pixel constituting a pixel matrix. None of them require a backlight. Therefore, the OLED enables a very thin display module to be implemented, has a constant contrast ratio according to an angle and obtains a good color reproductivity depending on a temperature. Also, it is very economical in that non-driven pixel does not consume power.

In terms of operation, the PM-OLED emits light only during a scanning time at a high current, and the AM-OLED maintains a light emitting state only during a frame time at a low current. Therefore, the AM-OLED has a resolution higher than that of the PM-OLED and is advantageous for driving a large area display module and consumes low power. Also, a thin film transistor (TFT) is embedded in the AM-OLED, and thus, each component can be individually controlled, so that it is easy to implement a delicate screen.

In the embodiment of FIG. 7a , the backlight unit is not present between the display module 1015 and the pressure sensor 1050.

In the embodiment of FIG. 7a , the metal cover 1030 shown in FIG. 5a may be further disposed between the display module 1015 and the pressure sensor 1050.

In FIG. 7a , the mid-frame 1091 is spaced apart from the display module 1015 by a predetermined interval. An air-gap may be formed in the interval. However, there is no limitation to this. A predetermined cushion may be disposed in the interval.

The operation method is the same as that of the embodiment of FIG. 5a . That is, the touch pressure can be detected by using the mid-frame 1091 provided under the pressure sensor 1050 as the reference potential layer.

Meanwhile, the metal cover 1030 shown in FIG. 5b may be further disposed under the pressure sensor 1050. In this case, the pressure sensor 1050 may be disposed apart from the display module 1015 by a predetermined interval, and the reference potential layer for sensing the pressure may be disposed within the OLED module 1015.

FIG. 7b is a cross sectional view of the touch input device according to still another embodiment of the present invention.

As compared with the touch input device shown in FIG. 7a , the touch input device shown in FIG. 7b further includes the outer cover 1000′ and the position of the pressure sensor 1050 is different. In the touch input device shown in FIG. 7b , the outer cover 1000′ is disposed at a predetermined distance on the cover 1000, and the pressure sensor 1050 is disposed on the bottom surface of the outer cover 1000′.

The touch input device shown in FIG. 7b may have the space 1100 formed between the pressure sensor 1050 and the cover 1000. For a modified example, a compression layer made of a predetermined material may be disposed in the space 1100.

FIG. 8 is a cross sectional view of the touch input device according to still another embodiment of the present invention.

Compared to the touch input device shown in FIG. 7, the touch input device shown in FIG. 8 further includes the elastic member 1040. The remaining components are the same as those of the touch input device shown in FIG. 7.

Referring to FIG. 8, the elastic member 1040 is disposed between the OLED module 1015 and the pressure sensor 1050.

The elastic member 1040 is located under the OLED module 1015. Such an elastic member 1040 absorbs the external impact and protects the components (particularly, the display module) within the touch input device. Therefore, it is desirable that the elastic member 1040 should be made of a material having an elasticity to absorb the impact. However, the elastic member 1040 may be omitted or may be replaced by another component having the same function as that of the elastic member 1040. Also, the elastic member 1040 may be formed only on a portion of the lower area of the display module 1015 instead of the entire lower area of the display module 1015.

In the embodiment of FIG. 8, the metal cover 1030 shown in FIG. 6 may be further disposed between the OLED module 1015 and the elastic member 1040.

In FIG. 8, the mid-frame 1091 is spaced apart from the display module 1015 by a predetermined interval. An air-gap may be formed in the interval. However, there is no limitation to this. A predetermined cushion may be disposed in the interval.

The operation method is the same as that of the embodiment of FIG. 7. That is, the touch pressure can be detected by using the mid-frame 1091 provided under the pressure sensor 1050 as the reference potential layer.

FIG. 9 is a cross sectional view of the touch input device according to still another embodiment of the present invention.

In the touch input device shown in FIG. 9 compared to the touch input device shown in FIG. 5a , the pressure sensor 1050 is disposed on the mid-frame 1091. That is, the pressure sensor 1050 is disposed on the top surface of the mid-frame 1091. The remaining components are the same as those of the touch input device shown in FIG. 5 a.

In FIG. 9, the mid-frame 1091 is spaced apart from the display modules 1010 and 1020 by a predetermined interval. An air-gap may be formed in the interval. However, there is no limitation to this. A predetermined cushion may be disposed in the interval.

The operation method may be different from that of the embodiment of FIG. 5a . Specifically, the touch pressure can be detected by using the reference potential layer (not shown) disposed on the top surface or the bottom surface of the display modules 1010 and 1020. The touch pressure can be detected by using the reference potential layer (not shown) disposed between the LCD module 1010 and the backlight unit 1020. The touch pressure can be detected by using the reference potential layer (not shown) disposed between two layers among a plurality of layers which are within the LCD module 1010 and constitute the LCD module 1010. For example, when the LCD module 1010 includes a first substrate (or a color filter layer), a liquid crystal layer disposed under the first substrate, and a second substrate (or a TFT layer) disposed under the liquid crystal layer, the reference potential layer (not shown) may be disposed between the first substrate and the liquid crystal layer or may be disposed between the liquid crystal layer and the second substrate. Also, the touch pressure may be detected by using the metal cover 1030 as the reference potential layer.

FIG. 10 is a cross sectional view of the touch input device according to still another embodiment of the present invention.

In the touch input device shown in FIG. 10 compared to the touch input device shown in FIG. 6, the pressure sensor 1050 is disposed on the elastic member 1040 disposed on the mid-frame 1091. That is, the pressure sensor 1050 is disposed on the top surface of the elastic member 1040 disposed on the top surface of the mid-frame 1091. The remaining components are the same as those of the touch input device shown in FIG. 6.

In FIG. 10, the mid-frame 1091 is spaced apart from the display modules 1010 and 1020 by a predetermined interval. An air-gap may be formed in the interval. However, there is no limitation to this. A predetermined cushion may be disposed in the interval.

The operation method is the same as that of the embodiment of FIG. 6. The touch pressure can be detected by using the mid-frame 1091 provided under the pressure sensor 1050 as the reference potential layer.

Also, the operation method is the same as that of the embodiment of FIG. 9. The touch pressure can be detected by using the reference potential layer (not shown) disposed on the top surface or the bottom surface of the display modules 1010 and 1020. The touch pressure can be detected by using the reference potential layer (not shown) disposed between the LCD module 1010 and the backlight unit 1020. The touch pressure can be detected by using the reference potential layer (not shown) disposed between two layers among a plurality of layers which are within the LCD module 1010 and constitute the LCD module 1010. For example, when the LCD module 1010 includes the first substrate (or a color filter layer), the liquid crystal layer disposed under the first substrate, and the second substrate (or a TFT layer) disposed under the liquid crystal layer, the reference potential layer (not shown) may be disposed between the first substrate and the liquid crystal layer or may be disposed between the liquid crystal layer and the second substrate. Also, the touch pressure may be detected by using the metal cover 1030 as the reference potential layer.

FIG. 11 is a cross sectional view of the touch input device according to still another embodiment of the present invention.

In the touch input device shown in FIG. 11 compared to the touch input device shown in FIG. 7, the pressure sensor 1050 is disposed on the mid-frame 1091. That is, the pressure sensor 1050 is disposed on the top surface of the mid-frame 1091. The remaining components are the same as those of the touch input device shown in FIG. 7.

In the embodiment of FIG. 11, the metal cover 1030 shown in FIG. 9 may be further disposed between the display module 1015 and the pressure sensor 1050.

In FIG. 11, the mid-frame 1091 is spaced apart from the display module 1015 by a predetermined interval. An air-gap may be formed in the interval. However, there is no limitation to this. A predetermined cushion may be disposed in the interval.

The operation method may be different from that of the embodiment of FIG. 7. Specifically, the touch pressure can be detected by using the reference potential layer (not shown) disposed on the top surface or the bottom surface of the OLED module 1015. The touch pressure can be detected by using the reference potential layer (not shown) disposed between two layers among a plurality of layers which are within the OLED module 1015 and constitute the OLED module 1015. For example, when the OLED module 1015 includes the first substrate (or an encapsulation layer), an AMOLED layer disposed under the first substrate, and the second substrate (or a TFT layer) disposed under the AMOLED layer, the reference potential layer (not shown) may be disposed between the first substrate and the AMOLED layer or may be disposed between the AMOLED layer and the second substrate. Also, when the metal cover 1030 shown in FIG. 9 is further disposed, the touch pressure may be detected by using the metal cover as the reference potential layer.

FIG. 12 is a cross sectional view of the touch input device according to still another embodiment of the present invention.

In the touch input device shown in FIG. 12 compared to the touch input device shown in FIG. 8, the pressure sensor 1050 is disposed on the elastic member 1040 disposed on the mid-frame 1091. That is, the pressure sensor 1050 is disposed on the top surface of the elastic member 1040 disposed on the top surface of the mid-frame 1091. The remaining components are the same as those of the touch input device shown in FIG. 8.

In the embodiment of FIG. 12, the metal cover 1030 shown in FIG. 10 may be further disposed between the OLED module 1015 and the pressure sensor 1050.

In FIG. 12, the mid-frame 1091 is spaced apart from the display modules 1010 and 1020 by a predetermined interval. An air-gap may be formed in the interval. However, there is no limitation to this. A predetermined cushion may be disposed in the interval.

The operation method is the same as that of the embodiment of FIG. 8. That is, the touch pressure can be detected by using the mid-frame 1091 provided under the pressure sensor 1050 as the reference potential layer.

Also, the operation method is the same as that of the embodiment of FIG. 11. The touch pressure can be detected by using the reference potential layer (not shown) disposed on the top surface or the bottom surface of the OLED module 1015. The touch pressure can be detected by using the reference potential layer (not shown) disposed between two layers among a plurality of layers which are within the OLED module 1015 and constitute the OLED module 1015. For example, when the OLED module 1015 includes the first substrate (or an encapsulation layer), the AMOLED layer disposed under the first substrate, and the second substrate (or a TFT layer) disposed under the AMOLED layer, the reference potential layer (not shown) may be disposed between the first substrate and the AMOLED layer or may be disposed between the AMOLED layer and the second substrate. Also, when the metal cover 1030 shown in FIG. 10 is further disposed, the touch pressure may be detected by using the metal cover as the reference potential layer.

FIGS. 13a to 13d are cross sectional views of the touch input device according to still another embodiment of the present invention. Specifically, FIG. 13a is a cross sectional view of the touch input device according to still another embodiment of the present invention, and FIGS. 13b to 13d show various modified examples of the touch input device.

In the touch input device shown in FIGS. 13a to 13d compared to the touch input device shown in FIG. 5a , the pressure sensor 1050 is disposed within the LCD module 1010 of the display modules 1010 and 1020. That is, the pressure sensor 1050 of the touch input device shown in FIGS. 13a to 13d is embedded in the LCD module 1010 of the display modules 1010 and 1020. Various examples in which the pressure sensor 1050 is embedded in the LCD module 1010 will be described with reference to FIGS. 13b to 13 d.

As shown in FIG. 13b , the LCD module 1010′ includes the first substrate 1010 a, the liquid crystal layer 1010 b disposed under the first substrate, and the second substrate 1010 c disposed under the liquid crystal layer 1010 b. Here, the pressure sensor 1050 is directly formed on the top surface of the first substrate 1010 a of the LCD module 1010′.

The first substrate 1010 a may be made of glass or plastic. For example, the first substrate 1010 a may be made of color filter glass.

The second substrate 1010 c may be made of glass or plastic. For example, the second substrate 1010 c may be made of TFT glass.

The pressure sensor 1050 may be directly formed on the top surface of the first substrate 1010 a of the LCD module 1010′ in various ways. For example, the pressure sensor 1050 may be directly formed on the top surface of the first substrate 1010 a by using at least any one of a photolithography method, an etching resist method, an etching paste method, a gravure printing method, an inkjet printing method, a screen printing method, a flexography method, and a transfer printing method.

As shown in FIG. 13c , the LCD module 1010″ includes the first substrate 1010 a, the liquid crystal layer 1010 b disposed under the first substrate, and the second substrate 1010 c disposed under the liquid crystal layer 1010 b. Here, the pressure sensor 1050 is directly formed on the bottom surface of the first substrate 1010 a of the LCD module 1010″. The method of directly forming the pressure sensor 1050 on the bottom surface of the first substrate 1010 a may be any one of the above-described various methods.

As shown in FIG. 13d , the LCD module 1010′ includes the first substrate 1010 a, the liquid crystal layer 1010 b disposed under the first substrate, and the second substrate 1010 c disposed under the liquid crystal layer 1010 b. Here, the pressure sensor 1050 is directly formed on the top surface of the second substrate 1010 c of the LCD module 1010′″. The method of directly forming the pressure sensor 1050 on the top surface of the second substrate 1010 c may be any one of the above-described various methods. Though not shown in the figure, in still another embodiment, the pressure sensor 1050 may be directly formed on the bottom surface of the second substrate 1010 c.

In the operation method of the touch input device shown in FIGS. 13b to 13d , the mid-frame 1091 provided under the display modules 1010 and 1020 in which the pressure sensor 1050 has been embedded is used as the reference potential layer, thereby detecting the touch pressure.

Here, though not shown in a separate figure, the metal cover 1030 shown in FIG. 5a may be disposed between the mid-frame 1091 and the display modules 1010 and 1020 in which the pressure sensor 1050 has been embedded. Also, the elastic member 1040 shown in FIG. 6 may be disposed between the mid-frame 1091 and the display modules 1010 and 1020 in which the pressure sensor 1050 has been embedded. Here, when the metal cover 1030 shown in FIG. 5a may be further disposed between the mid-frame 1091 and the display modules 1010 and 1020 in which the pressure sensor 1050 has been embedded, the touch pressure can be detected by using the metal cover as the reference potential layer.

FIGS. 14a to 14e are cross sectional views of the touch input device according to still another embodiment of the present invention. Specifically, FIG. 14a is a cross sectional view of the touch input device according to still another embodiment of the present invention, and FIGS. 14b to 14e show various modified examples of the touch input device.

In the touch input device shown in FIGS. 14a to 14e compared to the touch input device shown in FIG. 7, the pressure sensor 1050 is disposed within the OLED module 1015, i.e., the display module. That is, the pressure sensor 1050 of the touch input device shown in FIGS. 14a to 14e is embedded in the OLED module 1015. Various examples in which the pressure sensor 1050 is embedded in the OLED module 1015 will be described with reference to FIGS. 14b to 14 e.

As shown in FIG. 14b , the OLED module 1015′ includes a first substrate 1015 a, an AMOLED layer 1015 b disposed under the first substrate, and a second substrate 1015 c disposed under the AMOLED layer 1015 b. Here, the pressure sensor 1050 is directly formed on the top surface of the first substrate 1015 a of the OLED module 1015′.

The first substrate 1015 a may be made of glass or plastic. For example, the first substrate 1015 a may be made of encapsulated glass.

The second substrate 1015 c may be made of glass or plastic. For example, the second substrate 1015 c may be made of TFT glass.

The pressure sensor 1050 may be directly formed on the top surface of the first substrate 1015 a of the OLED module 1015′ in various ways. For example, the pressure sensor 1050 may be directly formed on the top surface of the first substrate 1015 a by using at least any one of a photolithography method, an etching resist method, an etching paste method, a gravure printing method, an inkjet printing method, a screen printing method, a flexography method, and a transfer printing method.

As shown in FIG. 14c , the OLED module 1015″ includes the first substrate 1015 a, the AMOLED layer 1015 b disposed under the first substrate, and the second substrate 1015 c disposed under the AMOLED layer 1015 b. Here, the pressure sensor 1050 is directly formed on the bottom surface of the first substrate 1015 a of the OLED module 1015″. The method of directly forming the pressure sensor 1050 on the bottom surface of the first substrate 1015 a may be any one of the above-described various methods.

As shown in FIG. 14d , the OLED module 1015′ includes the first substrate 1015 a, the AMOLED layer 1015 b disposed under the first substrate, and the second substrate 1015 c disposed under the AMOLED layer 1015 b. Here, the pressure sensor 1050 is directly formed on the top surface of the second substrate 1015 c of the OLED module 1015′″. The method of directly forming the pressure sensor 1050 on the top surface of the second substrate 1015 c may be any one of the above-described various methods.

As shown in FIG. 14e , the OLED module 1015″″ includes the first substrate 1015 a, the AMOLED layer 1015 b disposed under the first substrate, and the second substrate 1015 c disposed under the AMOLED layer 1015 b. Here, the pressure sensor 1050 is directly formed on the bottom surface of the second substrate 1015 c of the OLED module 1015″″. The method of directly forming the pressure sensor 1050 on the bottom surface of the second substrate 1015 c may be any one of the above-described various methods.

In the operation method of the touch input device shown in FIGS. 14b to 14e , the mid-frame 1091 provided under the display module 1015 in which the pressure sensor 1050 has been embedded is used as the reference potential layer, thereby detecting the touch pressure. Here, though not shown in a separate figure, the metal cover 1030 shown in FIG. 5a may be disposed between the mid-frame 1091 and the display module 1015 in which the pressure sensor 1050 has been embedded. Also, the elastic member 1040 shown in FIG. 6 may be disposed between the mid-frame 1091 and the display module 1015 in which the pressure sensor 1050 has been embedded. Here, when the metal cover 1030 shown in FIG. 5a may be further disposed between the mid-frame 1091 and the display modules 1010 and 1020 in which the pressure sensor 1050 has been embedded, the touch pressure can be detected by using the metal cover as the reference potential layer.

Also, in the operation method of the touch input device shown in FIGS. 14b to 14e , the touch pressure can be detected by using the mutual capacitance type according to the distance change between the pressure sensor 1050 embedded within the display module 1015 and another pressure sensor (not shown) provided separately under the display module 1015.

FIGS. 15a to 15d are cross sectional views of the touch input device according to still another embodiment of the present invention. Specifically, FIG. 15a is a cross sectional view of the touch input device according to still another embodiment of the present invention, and FIGS. 15b to 15d show various modified examples of the touch input device.

The touch input device shown in FIGS. 15a to 15d compared to the touch input device shown in FIG. 7 does not include the pressure sensor 1050. The touch input device shown in FIGS. 15a to 15d can detect the pressure by using the drive electrode for driving the display modules 1010 and 1015 or by using a touch sensor mounted inside or outside the display modules 1010 and 1015. This will be described in detail with reference to FIGS. 15b to 15 d.

In FIG. 15a , the LCD module 1010 shown in FIG. 13a and the OLED module 1015 shown in FIG. 14a may be disposed under the cover 1000. Meanwhile, when the LCD module 1010 is disposed under the cover 1000, the backlight unit 1020 shown in FIG. 13a is omitted under the LCD module 1010.

As shown in FIG. 15b , the touch sensors 100 a and 100 b include a plurality of electrodes 100 a and 100 b for detecting the touch position.

Here, the plurality of the electrodes 100 a and 100 b include the drive electrode 100 a to which a drive signal for the mutual capacitance type is input and the receiving electrode 100 b from which a sensing signal is output. The drive electrode 100 a and the receiving electrode 100 b may be directly formed apart from each other on the top surface of the first substrate 1010 a or 1015 a of the LCD module 1010 or the OLED module 1015.

Meanwhile, each of the plurality of the electrodes 100 a and 100 b may be a self-electrode for the self-capacitance type, to which the drive signal is input and from which the sensing signal is output.

The method for directly forming the plurality of the electrodes 100 a and 100 b on the top surface of the first substrate 1010 a or 1015 a may be at least any one of a photolithography method, an etching resist method, an etching paste method, a gravure printing method, an inkjet printing method, a screen printing method, a flexography method, and a transfer printing method.

In the touch input device including the display module (1010 or 1015)′ shown in FIG. 15b , the touch pressure can be detected by using the mid-frame 1091 as the reference potential layer on the basis of the capacitance which changes according to the change of the distance between the mid-frame 1091 and at least any one of the plurality of the electrodes 100 a and 100 b. In the detection of the touch pressure through use of the change of distance between the reference potential layer and the plurality of the electrodes 100 a and 100 b, the touch pressure may be detected in the mutual capacitance type by distinguishing the plurality of the electrodes 100 a and 100 b as the drive electrode and the receiving electrode or may be detected even in the self-capacitance type by using the plurality of the electrodes 100 a and 100 b as the self-electrode.

Also, the touch input device including the display module (1010 or 1015)′ shown in FIG. 15b can detect the touch pressure even by the mutual capacitance type in which the plurality of electrodes 100 a and 100 b are used as a drive electrode and another electrode provided separately under the display module (1010 or 1015)′ is used as a receiving electrode.

As shown in FIG. 15c , the touch sensors 100 a and 100 b include the drive electrode 100 a and the receiving electrode 100 b. The drive electrode 100 a is directly formed on the top surface of the second substrate 1010 c or 1015 c of the LCD module 1010 or the OLED module 1015, and the receiving electrode 100 b is directly formed on the top surface of the first substrate 1010 a or 1015 a of the LCD module 1010 or the OLED module 1015. The method of directly forming the drive electrode 100 a on the top surface of the second substrate 1010 c or 1015 c and of directly forming the receiving electrode 100 b on the top surface of the first substrate 1010 a or 1015 a may be any one of the above-described various methods.

In the touch input device including the display module (1010 or 1015)″ shown in FIG. 15c , the touch pressure can be detected by using the mid-frame 1091 as the reference potential layer on the basis of the capacitance which changes according to the change of the distance between the mid-frame 1091 and at least any one of the drive electrode 100 a and the receiving electrode 100 b.

Meanwhile, though not shown in a separate figure, in FIG. 15c , the drive electrode 100 a may be disposed on the bottom surface of the first substrate 1010 a or 1015 a. In this case, the touch input device is also able to operate in the same manner as the touch input device including the display module (1010 or 1015)″ of FIG. 15 c.

The drive electrode 100 a shown in FIG. 15c can be also used as an electrode for driving the display module (1010 or 1015)″.

As shown in FIG. 15d , the touch sensors 100 a and 100 b include the drive electrode 100 and the receiving electrode 100 b for detecting the touch position. The drive electrode 100 a and the receiving electrode 100 b may be directly formed apart from each other on the top surface of the second substrate 1010 c or 1015 c of the LCD module 1010 or the OLED module 1015.

Here, the drive electrode 100 and the receiving electrode 100 b may be a common electrode for driving the liquid crystal layer or the AMOLED layer 1010 b or 1015 b.

In the touch input device including the display module (1010 or 1015)′″ shown in FIG. 15d , the touch pressure can be detected by using the mid-frame 1091 as the reference potential layer on the basis of the capacitance which changes according to the change of the distance between the mid-frame 1091 and at least any one of the drive electrode 100 a and the receiving electrode 100 b.

Meanwhile, though not shown in a separate figure, in FIG. 15d , the drive electrode 100 a and the receiving electrode 100 b may be disposed on the bottom surface of the first substrate 1010 a or 1015 a. In this case, the touch input device is also able to operate in the same manner as the touch input device including the display module (1010 or 1015)′″ of FIG. 15 d.

Though not shown in a separate figure, the metal cover 1030 shown in FIG. 5a may be disposed between the mid-frame 1091 and the display module 1010 or 1015. Also, the elastic member 1040 shown in FIG. 6 may be disposed between the mid-frame 1091 and the display module 1010 or 1015. Here, when the metal cover 1030 shown in FIG. 5a may be further disposed between the mid-frame 1091 and the display module 1010 or 1015, the touch pressure can be detected by using the metal cover as the reference potential layer.

Also, the touch input device including the display module (1010 or 1015)′″ shown in FIG. 15d can detect the touch pressure even by the mutual capacitance type in which the plurality of electrodes 100 a and 100 b are used as a drive electrode and another electrode provided separately under the display module (1010 or 1015)′″ is used as a receiving electrode.

At least one of the touch sensors 100 a and 100 b shown in FIG. 15d can be used as an electrode for driving the display module (1010 or 1015)′″.

FIG. 16 is a view for describing an example of a coupling structure between the mid-frame 1091 and the housing 1080 shown in FIGS. 5a to 15.

Referring to FIG. 16, the guide member 1091 a shown in FIGS. 5a to 15 is disposed on the bottom surface of the mid-frame 1091.

The guide member 1091 a protrudes from the bottom surface of the mid-frame 1091 and divides the bottom surface of the mid-frame 1091 into a plurality of portions. The plurality of the portions formed by the guide member 1091 a, together with the bottom surface of the mid-frame 1091, form a plurality of receiving spaces. The battery 1060, the mainboard 1070, etc., shown in FIGS. 5a to 15 are disposed in the plurality of the formed receiving spaces.

The guide member 1091 a may function to not only guide the battery 1060, the mainboard 1070, etc., shown in FIGS. 5a to 15 but also support the mid-frame 1091 such that the mid-frame 1091 is not bent or broken by an external force. It is important that the mid-frame 1091 should not be bent or broken by an external force because the mid-frame 1091 functions as the reference potential layer for the pressure electrode of the pressure sensor 1050 shown in FIGS. 5a and 6 to 15. Here, it is not sufficient to completely eliminate or reduce the bending or breakage of the mid-frame 1091 due to the external force by simply disposing the guide member 1091 a on the bottom surface of the mid-frame 1091. The bending or breakage of the mid-frame 1091 due to the external force can be significantly reduced or completely eliminated by coupling the guide member 1091 a to the housing 180.

An end of the guide member 1091 a contacts the bottom surface (or inner surface) of the housing 1080. When the end of the guide member 1091 a contacts the bottom surface of the housing 1080, the housing 1080 supports directly the guide member 1091 a, and the housing 1080 and the guide member 1091 a are integrated as one body. Therefore, it is possible to significantly reduce or completely eliminate the bending of the mid-frame 1091, which is caused by a predetermined force such as an external force by the user or external equipment, gravity, reaction by momentary movement in a particular direction, etc.

Further, when the end of the guide member 1091 a contacts the bottom surface of the housing 1080, it is possible to constantly maintain the pressure sensing sensitivity of the touch input device. For example, in a case where the mid-frame 1091 is the reference potential layer of the pressure sensor, when the mid-frame 1091 is deformed by the external force, the distance between the pressure sensor and the mid-frame 1091 as the reference potential layer is changed, so that the pressure sensing sensitivity may be changed according to the position. The end of the guide member 1091 a contacts the bottom surface of the housing 1080, it is possible to constantly maintain the pressure sensing sensitivity of the touch input device.

As shown in FIG. 16, the guide member 1091 a may have a groove 1091 h, and a bottom plate 1081 of the housing 1080 may include a protrusion 1081 p which can be inserted into the groove 1091 h of the guide member 1091 a.

The protrusion 1081 p may have a structure that requires a predetermined external force allowing the protrusion 1081 p to be inserted into or separated from the groove 1091 h. The protrusion 1081 p cannot be inserted into the groove 1091 h without the predetermined external force, and the protrusion 1081 p inserted into the groove 1091 h cannot be separated from the groove 1091 h without the predetermined external force.

The structure and shape of the groove 1091 h may correspond to those of the protrusion 1081 p. The width of the inner space of the groove 1091 h may be greater than the width of the entrance of the groove 1091 h. The protrusion 1081 p may have a structure corresponding thereto.

The number of grooves 1091 h may be the same as the number of protrusions 1081 p, so that they can one-to-one correspond to each other. The number of grooves 1091 h may be less than the number of protrusions 1081 p. For example, two or more protrusions 1081 p may be inserted into one groove 1091 h.

The protrusion 1081 p can be inserted into the groove 1091 h in a fitting manner. The protrusion 1081 p can be inserted into the groove 1091 h in any one of a clearance fit manner, an interference fit manner, and a transition fit manner.

FIG. 17 is a view for describing another example of the coupling structure between the mid-frame 1091 and the housing 1080 shown in FIGS. 5a to 15.

The example shown in FIG. 17 shows that the groove and the protrusion have opposite positions to those of the groove and the protrusion of the example shown in FIG. 16.

Referring to FIG. 17, the guide member 1091 a may include a protrusion 1091 p and the bottom plate 1081 of the housing 1080 may have a groove 1081 h into which the protrusion 1091 p of the guide member 1091 a can be inserted.

The protrusion 1091 p may have a structure that requires a predetermined external force allowing the protrusion 1091 p to be inserted into or separated from the groove 1081 h. The protrusion 1091 p cannot be inserted into the groove 1081 h without the predetermined external force, and the protrusion 1091 p inserted into the groove 1081 h cannot be separated from the groove 1081 h without the predetermined external force.

The structure and shape of the groove 1081 h may correspond to those of the protrusion 1091 p. The width of the inner space of the groove 1081 h may be greater than the width of the entrance of the groove 1081 h. The protrusion 1091 p may have a structure corresponding thereto.

The number of grooves 1081 h may be the same as the number of protrusions 1091 p, so that they can one-to-one correspond to each other. The number of grooves 1081 h may be less than the number of protrusions 1091 p. For example, two or more protrusions 1091 p may be inserted into one groove 1081 h.

The protrusion 1091 p can be inserted into the groove 1081 h in a fitting manner. The protrusion 1091 p can be inserted into the groove 1081 h in any one of a clearance fit manner, an interference fit manner, and a transition fit manner.

FIG. 18 is a view for describing further another example of the coupling structure between the mid-frame 1091 and the housing 1080 shown in FIGS. 5a to 15.

Referring to FIG. 18, the end of the guide member 1091 a contacts the bottom surface (or inner surface) of the housing 1080. A coupling member 1100 may couple the guide member 1091 a to the bottom plate 1081 of the housing 1080 in order that the guide member 1091 a and the bottom plate 1081 of the housing 1080 are not separated from each other. Here, the coupling member 1100 may pass through the bottom plate 1081 and be embedded in the guide member 1091 a. The coupling member 1100 may be any one of a rivet, a screw, and a tapping screw.

FIG. 19 is a view for describing yet another example of the coupling structure between the mid-frame 1091 and the housing 1080 shown in FIGS. 5a to 15.

Referring to FIG. 19, the guide member 1091 a has the groove 1091 h, and the bottom plate 1081 of the housing 1080 has the groove 1081 h.

The groove 1091 h of the guide member 1091 a is disposed on the groove 1081 h of the bottom plate 1081. A coupling member 1100′ is disposed in the groove 1081 h of the bottom plate 1081 and in the groove 1091 h of the guide member 1091 a.

The upper portion of the coupling member 1100′ is inserted into the groove 1091 h of the guide member 1091 a, and the lower portion of the coupling member 1100′ is inserted into the groove 1081 h of the bottom plate 1081. The structure and shape of the upper portion of the coupling member 1100′ may correspond to those of the groove 1091 h of the guide member 1091 a. The structure and shape of the lower portion of the coupling member 1100′ may correspond to those of the groove 1081 h of the bottom plate 1081.

The upper portion of the coupling member 1100′ may have a structure that requires a predetermined external force allowing the upper portion to be inserted into or separated from the groove 1091 h of the guide member 1091 a.

The number of grooves 1081 h of the bottom plate 1081 may be the same as the number of grooves 1091 h of the guide member 1091 a, so that they can one-to-one correspond to each other. The number of grooves 1081 h of the bottom plate 1081 may be different from the number of grooves 1091 h of the guide member 1091 a.

The coupling member 1100′ can be inserted into the groove 1081 h of the bottom plate 1081 or into the groove 1091 h of the guide member 1091 a in a fitting manner. The coupling member 1100′ can be inserted into the groove 1081 h of the bottom plate 1081 or into the groove 1091 h of the guide member 1091 a in any one of a clearance fit manner, an interference fit manner, and a transition fit manner.

FIG. 20 is a view for describing still another example of the coupling structure between the mid-frame 1091 and the housing 1080 shown in FIGS. 5a to 15.

Referring to FIG. 20, as shown in FIG. 19, the guide member 1091 a has a groove, and the bottom plate 1081 of the housing 1080 has a groove. The groove of the guide member 1091 a is disposed on the groove of the bottom plate 1081. A coupling member 1100′ is disposed in the groove of the bottom plate 1081 and in the groove of the guide member 1091 a.

The coupling member 1100″ may be an adhesive member. The adhesive member includes an adhesive agent and an adhesive tape.

By using various examples shown in FIGS. 16, 17, 18, 19, and 20, advantageous effects can be obtained in the manufacturing process of the touch input devices shown, in particular, in FIGS. 9 to 12 among the touch input devices shown in FIGS. 5a to 15. Specifically, in the manufacture of the touch input devices shown in FIGS. 9 to 12, when the mid-frame 1091 is coupled to the housing 1080 after the cover 1000, the display modules 1010, 1020, and 1015, and the pressure sensor 1050 are mounted on the mid-frame 1091, the coupling member 1100 cannot be, as shown in a below-described example of FIG. 21, coupled to the mid-frame 1091 because the pressure sensor 1050, etc., have been already mounted on the mid-frame 1091. However, by using various examples shown in FIGS. 16, 17, 18, 19, and 20, there is an advantage that the mid-frame 1091 and the housing 1080 can be coupled to each other even without separating the pressure sensor 1050 from the mid-frame 1091.

Also, by using various examples shown in FIGS. 16, 17, 18, 19, and 20, advantageous effects can be obtained when the battery 1060 or the mainboard 1070 of the touch input device shown in FIGS. 5a to 15 is checked, repaired or replaced. In the below-described example of FIG. 21, when the battery 1060 or the mainboard 1070 is checked, repaired or replaced, it is complicated to remove the cover 1000, the display modules 1010, 1020, and 1015, and the pressure sensor 1050, which have been mounted on the mid-frame 1091 and then to pull out the coupling member 1100. However, in the various examples shown in FIGS. 16, 17, 18, 19, and 20, it is possible to separate the mid-frame 1091 from the housing 1080 by applying a predetermined force or by removing the coupling member, without having to remove the cover 1000, the display modules 1010, 1020, and 1015, and the pressure sensor 1050, which have been mounted on the mid-frame 1091.

FIG. 21 is a view for describing still another example of the coupling structure between the mid-frame 1091 and the housing 1080 shown in FIGS. 5a to 15.

The example shown in FIG. 21 is different from the various examples shown in FIGS. 16 to 20. While the mid-frame 1091 of the various examples shown in FIGS. 16 to 20 includes the guide member 1091 a, the mid-frame 1091 of the example shown in FIG. 21 has no guide member. Instead, the bottom plate 1081 of the housing 1080 includes a guide member 1081 a.

The guide member 1081 a protrudes from the inner surface of the bottom plate 1081, and the end of the guide member 1081 a is coupled to the bottom surface of the mid-frame 1091. Here, the coupling member 1100 as shown in FIG. 18 passes through the mid-frame 1091 and is embedded in the guide member 1081 a.

Though not shown in a separate figure, the coupling structure shown in FIGS. 16, 17, 19, and 20 can be applied to the example shown in FIG. 21.

The example shown in FIG. 21 can produce advantageous effects in the manufacturing process of the touch input devices shown, in particular, in FIGS. 5a to 8, 13 a, and 14 a among the touch input devices shown in FIGS. 5a to 15. In the touch input devices shown in FIGS. 5a to 8, 13 a, and 14 a, after the cover 1000 and the display modules 1010, 1020, and 1015 are manufactured through a separate process and the housing 1080 and the mid-frame 1091 are manufactured in a process different from the previous process, the cover 1000 and the display modules 1010, 1020, and 1015 can be mounted on the mid-frame 1091 coupled to the housing 1080. Since the housing 1080 and the mid-frame 1091 have been already coupled to each other within the housing 1080 by the coupling member 1100, there is an advantage that the coupling member 1100 is invisible to the outside eye, contrary to the example of FIG. 18.

FIG. 22 is a view for describing a modified example of the coupling structure between the mid-frame 1091 and the housing 1080 shown in FIG. 21.

As compared with the embodiment shown in FIG. 21, the position of the pressure sensor 1050 of the modified example shown in FIG. 22 is different. Specifically, referring to FIG. 22, the coupling member 1100 passes through the bottom plate 1081 of the housing 1080 and the guide member 1081 a of the housing 1080 and is embedded in the mid-frame 1091.

FIG. 23 is a view for describing a modified example of the coupling structure between the mid-frame 1091 and the housing 1080 shown in FIG. 22.

In the modified example shown in FIG. 23, both the mid-frame 1091 and the housing 1080 include the guide members 1091 a and 1081 a. The guide member 1091 a of the mid-frame 1091 is coupled to the guide member 1081 a of the housing 1080.

The coupling member 1100 passes through the bottom plate 1081 of the housing 1080 and the guide member 1081 a of the housing 1080 and is embedded in the guide member 1091 a of the mid-frame 1091.

By using various examples shown in FIGS. 22 and 23, advantageous effects can be obtained in the manufacturing process of the touch input devices shown, in particular, in FIGS. 9 to 12 among the touch input devices shown in FIGS. 5a to 15. Specifically, in the manufacture of the touch input devices shown in FIGS. 9 to 12, when the mid-frame 1091 is coupled to the housing 1080 after the cover 1000, the display modules 1010, 1020, and 1015, and the pressure sensor 1050 are mounted on the mid-frame 1091, the coupling member 1100 cannot be, as shown in a below-described example of FIG. 21, coupled to the mid-frame 1091 because the pressure sensor 1050, etc., have been already mounted on the mid-frame 1091. However, by using various examples shown in FIGS. 22 and 23, there is an advantage that the mid-frame 1091 and the housing 1080 can be coupled to each other even without separating the pressure sensor 1050 from the mid-frame 1091.

Though not shown in a separate figure, the coupling structure shown in FIGS. 16, 17, 19, and 20 can be applied to the modified examples shown in FIGS. 22 and 23.

FIG. 24 is a view for describing still another example of the coupling structure between the mid-frame 1091 and the housing 1080 shown in FIGS. 5a to 15.

Referring to FIG. 24, the housing 1080 includes the bottom plate 1081 and a side plate 1083′ extending from the bottom plate 1081. The side plate 1083′ includes an outer surface and an inner surface. The inner surface includes a stepped surface 1083 a′ supporting an end of the mid-frame 1091. The end of the mid-frame 1091 is disposed on the stepped surface 1083 a′. A coupling member 1200 passes through the end of the mid-frame 1091 and is embedded in the stepped surface 1083 a′ to a predetermined depth.

As such, the coupling of the housing 1080 and the mid-frame 1091 has an advantage of reducing the movement or deformation of the mid-frame 1091, which is caused by a predetermined force such as an external force by the user or external equipment, gravity, reaction by a momentary movement in a particular direction, etc., because the side plate 1083′ of the housing 1080 supports both ends of the mid-frame 1091 and the coupling member 1200 securely couples both ends of the mid-frame 1091 and the side plate 1083′ of the housing 1080.

The mid-frame 1091 may include the guide member 1091 a. The guide member 1091 a is any one of those shown in FIGS. 16 to 23 and can be coupled to the bottom plate 1081 of the housing 1080.

FIG. 25a is a view for describing still another example of the coupling structure between the mid-frame 1091 and the housing 1080 shown in FIGS. 5a to 15.

As compared with the example shown in FIG. 24, the coupling position of the coupling member 1200 of the example shown in FIG. 25a is different.

In the example shown in FIG. 25a , the coupling member 1200 passes through the side plate 1083′ of the housing 1080 and is embedded in both ends of the mid-frame 1091 to a predetermined depth. Here, both ends of the mid-frame 1091 have an upwardly bent shape.

As such, the coupling of the housing 1080 and the mid-frame 1091 has an advantage of reducing the movement or deformation of the mid-frame 1091, which is caused by a predetermined force such as an external force by the user or external equipment, gravity, reaction by a momentary movement in a particular direction, etc., because the side plate 1083′ of the housing 1080 supports both ends of the mid-frame 1091 and the coupling member 1200 securely couples both ends of the mid-frame 1091 and the side plate 1083′ of the housing 1080.

The mid-frame 1091 may include the guide member 1091 a. The guide member 1091 a is any one of those shown in FIGS. 16 to 23 and can be coupled to the bottom plate 1081 of the housing 1080.

FIG. 25b is a view for describing a modified example of the coupling structure between the mid-frame 1091 and the housing 1080 shown in FIG. 25 a.

The shape of both ends of the mid-frame 1091 of the modified example shown in FIG. 25b is different from the shape of both ends of the mid-frame 1091 of the modified example shown in FIG. 25a . The rest are the same.

While both ends of the mid-frame 1091 of the modified example shown in FIG. 25a have an upwardly bent shape, both ends of the mid-frame 1091 of the modified example shown in FIG. 25b have a downwardly bent shape.

FIG. 25c is a view for describing a modified example of the coupling structure between the mid-frame 1091 and the housing 1080 shown in FIG. 25 a.

Only the coupling position of the coupling member 1200 of the modified example shown in FIG. 25c is different from the coupling position of the coupling member 1200 of the modified example shown in FIG. 25a . The rest are the same.

In the modified example shown in FIG. 25c , the coupling member 1200 passes through both ends of the mid-frame 1091 and is embedded in the side plate 1083′.

FIG. 25d is a view for describing a modified example of the coupling structure between the mid-frame 1091 and the housing 1080 shown in FIG. 25 b.

Only the coupling position of the coupling member 1200 of the modified example shown in FIG. 25d is different from the coupling position of the coupling member 1200 of the modified example shown in FIG. 25b . The rest are the same.

In the modified example shown in FIG. 25d , the coupling member 1200 passes through both ends of the mid-frame 1091 and is embedded in the side plate 1083′.

FIG. 26 is a front view of the mid-frame 1091 shown in FIGS. 5a to 15a as viewed from the bottom.

Referring to FIG. 26, the bottom surface of the mid-frame 1091 has a predetermined horizontal length and a predetermined vertical length. The vertical length is greater than the horizontal length. A guide member 1091 a′ is disposed on the bottom surface of the mid-frame 1091. The guide member 1091 a′ is disposed in the middle portion of the bottom surface of the mid-frame 1091 in the vertical longitudinal direction of the bottom surface of the mid-frame 1091. Here, the middle portion of the bottom surface of the mid-frame 1091 may be a certain area including the center of the bottom surface of the mid-frame 1091 and is not limited to this. The battery 1060 may be disposed on the left side with respect to the guide member 0191 a′ and the mainboard 1070 may be disposed on the right side. In consideration of the size of the battery 1060, the guide member 1091 a′ may be disposed to lean to either side.

The groove 1091 h shown in FIG. 16 may be formed in the guide member 1091 a′ or the protrusion 1091 p shown in FIG. 17 may be disposed on the guide member 1091 a′. Here, the groove 1091 h shown in FIG. 16 or the protrusion 1091 p shown in FIG. 17 may have a shape shown in FIG. 27.

FIG. 28 shows a modified example of FIG. 26 and is a front view of the mid-frame 1091 shown in FIGS. 5a to 15a as viewed from the bottom.

Referring to FIG. 28, the bottom surface of the mid-frame 1091 has a predetermined horizontal length and a predetermined vertical length. The vertical length is greater than the horizontal length. A guide member 1091 a′ is disposed on the bottom surface of the mid-frame 1091. The guide member 1091 a′ is disposed in the middle portion of the bottom surface of the mid-frame 1091 in the horizontal longitudinal direction of the bottom surface of the mid-frame 1091. Here, the middle portion of the bottom surface of the mid-frame 1091 may be a certain area including the center of the bottom surface of the mid-frame 1091 and is not limited to this. The battery 1060 may be disposed on the upper side with respect to the guide member 0191 a′ and the mainboard 1070 may be disposed on the lower side. In consideration of the size of the battery 1060, the guide member 1091 a′ may be disposed to lean to either side.

The groove 1091 h shown in FIG. 16 or the protrusion 1091 p shown in FIG. 17 may be disposed on the guide member 1091 a′ as shown in FIG. 26 or 27.

FIG. 29 shows a modified example through the combination of FIG. 27 and FIG. 28 and is a front view of the mid-frame 1091 shown in FIGS. 5a to 15a as viewed from the bottom.

Referring to FIG. 29, the bottom surface of the mid-frame 1091 has a predetermined horizontal length and a predetermined vertical length. The vertical length is greater than the horizontal length. The first guide member 1091 a′ is disposed on the bottom surface of the mid-frame 1091 in the horizontal longitudinal direction of the bottom surface of the mid-frame 1091. The second guide member 1091 a is disposed on the bottom surface of the mid-frame 1091 in the vertical longitudinal direction of the bottom surface of the mid-frame 1091. The first guide member 1091 a′ and the second guide member 1091 a may be connected to each other. One end of the first guide member 1091 a′ may be connected to the second guide member 1091 a.

The mainboard 1070 may be disposed on the upper side with respect to the first guide member 1091 a′ and the battery 1060 may be disposed on the right side with respect to the second guide member 1091 a. Another member 1075 may be further disposed on the left side with respect to the second guide member 1091 a.

The groove 1091 h shown in FIG. 16 or the protrusion 1091 p shown in FIG. 17 may be disposed on the first guide member 1091 a′ and the second guide member 1091 a as shown in FIG. 26 or 27.

FIG. 30 shows a modified example of the touch input device shown in FIG. 5 a.

Referring to FIG. 30, in terms of the mid-frame 1091, the touch input device shown in FIG. 30 is different from the touch input device shown in FIG. 5 a.

As compared with the mid-frame 1091 shown in FIG. 5a , the mid-frame 1091 shown in FIG. 30 further includes an edge guide member 1091 e. The edge guide member 1091 e is disposed on the edge of the bottom surface of the mid-frame 1091.

An end of the edge guide member 1091 e contacts the top surface of the bottom plate of the housing 1080. When the end of the edge guide member 1091 e contacts the top surface of the bottom plate of the housing 1080, the housing 1080 supports directly not only the guide member 1091 a but also the edge guide member 1091 e, so that it is possible to further reduce the bending of the mid-frame 1091, which is caused by a predetermined force such as an external force by the user or external equipment, gravity, reaction by a momentary movement in a particular direction, etc. In other words, the edge guide member 1091 e can more reinforce the strength of the mid-frame 1091 than the mid-frame 1091 shown in FIG. 5a . Further, when the end of the edge guide member 1091 e contacts the bottom plate of the housing 1080, it is possible to more constantly maintain the pressure sensing sensitivity of the touch input device. Further, by the edge guide member 1091 e, the battery 1060 and the mainboard 1070 can be more stably protected from the external impact.

Meanwhile, though not shown in a separate figure, the coupling structure of the mid-frame 1091 and the housing 1080 shown in FIGS. 16 to 25 b can be applied to the edge guide member 1091 e.

Although the embodiments of the present invention were described above, these are just examples and do not limit the present invention. Further, the present invention may be changed and modified in various ways, without departing from the essential features of the present invention, by those skilled in the art. For example, the components described in detail in the embodiments of the present invention may be modified. Further, differences due to the modification and application should be construed as being included in the scope and spirit of the present invention, which is described in the accompanying claims.

REFERENCE NUMERALS

-   . . . 1000 cover -   . . . 1010 LCD module -   . . . 1015 OLED module -   . . . 1020 backlight unit -   . . . 1030 metal cover -   . . . 1040 elastic member -   . . . 1050 pressure sensor -   . . . 1060 battery -   . . . 1070 mainboard -   . . . 1080 housing -   . . . 1091 mid-frame 

The invention claimed is:
 1. A touch input device which comprises at least one cover and a display module disposed under the cover, and detects a pressure of a touch input to the cover, the touch input device comprising: a housing which comprises a bottom plate on which a battery and a mainboard are disposed; a mid-frame which is disposed within the housing, is disposed under the display module, and is disposed on the battery and on the mainboard, and a pressure sensor which is located between the cover and the mid-frame and detects a pressure of the touch, wherein the mid-frame comprises a guide member which is extended from a bottom surface of the mid-frame to the bottom plate of the housing and is coupled to a top surface of the bottom plate of the housing.
 2. The touch input device of claim 1, wherein the bottom plate of the housing has a groove, and wherein the guide member of the mid-frame comprises a protrusion that is insertable into the groove.
 3. The touch input device of claim 1, wherein the guide member of the mid-frame has a groove, and wherein the bottom plate of the housing comprises a protrusion which is insertable into the groove.
 4. The touch input device of claim 1, further comprising a coupling member which passes through the bottom plate of the housing and is embedded in the guide member of the mid-frame to a predetermined depth.
 5. The touch input device of claim 1, wherein the guide member of the mid-frame and the bottom plate of the housing have a groove, and further comprising a coupling member which is insertable into the groove of the guide member and the groove of the bottom plate.
 6. The touch input device of claim 1, wherein the guide member of the mid-frame and the bottom plate of the housing have a groove, and further comprising an adhesive agent or an adhesive tape which is disposed in the groove of the guide member and the groove of the bottom plate.
 7. The touch input device of claim 1, wherein the housing further comprises a side plate extending from the bottom plate, wherein an inner surface of the side plate comprises a stepped surface supporting both ends of the mid-frame, and further comprising a coupling member which passes through both ends of the mid-frame and is embedded in the stepped surface.
 8. The touch input device of claim 1, wherein the housing further comprises a side plate extending from the bottom plate, wherein an inner surface of the side plate comprises a stepped surface supporting both ends of the mid-frame, and further comprising a coupling member which passes through the side plate and is embedded in both ends of the mid-frame.
 9. The touch input device of claim 8, wherein both ends of the mid-frame are upwardly or downwardly bent.
 10. The touch input device of claim 1, wherein the housing further comprises a side plate extending from the bottom plate, wherein an inner surface of the side plate comprises a stepped surface supporting both ends of the mid-frame, and further comprising a coupling member which passes through both ends of the mid-frame and is embedded in the side plate.
 11. The touch input device of claim 10, wherein both ends of the mid-frame are upwardly or downwardly bent.
 12. The touch input device of claim 1, wherein the mid-frame comprises an edge guide member which is disposed on an edge of the bottom surface of the mid-frame, and wherein the edge guide member is coupled to the bottom plate of the housing.
 13. A touch input device which comprises at least one cover and a display module disposed under the cover, and detects a pressure of a touch input to the cover, the touch input device comprising: a housing which comprises a bottom plate on which a battery and a mainboard are disposed; a mid-frame which is disposed within the housing, is disposed under the display module, and is disposed on the battery and on the mainboard, and a pressure sensor which is located between the cover and the mid-frame and detects a pressure of the touch, wherein the housing comprises a guide member which is extended from a top surface of the bottom plate of the housing to a bottom surface of the mid-frame and is coupled to the bottom surface of the mid-frame.
 14. The touch input device of claim 13, wherein a bottom plate of the mid-frame has a groove, and wherein the guide member of the housing comprises a protrusion that is insertable into the groove.
 15. The touch input device of claim 13, wherein the guide member of the housing has a groove, and wherein a bottom plate of the mid-frame comprises a protrusion that is insertable into the groove.
 16. The touch input device of claim 13, further comprising a coupling member which passes through the bottom plate of the housing and the guide member of the housing and is embedded in the mid-frame to a predetermined depth.
 17. The touch input device of claim 13, further comprising a coupling member which passes through the mid-frame and is embedded in the guide member of the housing to a predetermined depth.
 18. The touch input device of claim 13, wherein the guide member of the housing and the mid-frame have a groove, and further comprising a coupling member which is insertable into the groove of the guide member and the groove of the mid-frame.
 19. The touch input device of claim 13, wherein the guide member of the housing and the mid-frame have a groove, and further comprising an adhesive agent or an adhesive tape which is disposed in the groove of the guide member and the groove of the mid-frame.
 20. A touch input device which comprises at least one cover and a display module disposed under the cover, and detects a pressure of a touch input to the cover, the touch input device comprising: a housing which comprises a bottom plate on which a battery and a mainboard are disposed; a mid-frame which is disposed within the housing, is disposed under the display module, and is disposed on the battery and on the mainboard, and a pressure sensor which is located between the cover and the mid-frame and detects a pressure of the touch, wherein the mid-frame comprises a guide member which is extended from a bottom surface of the mid-frame to the bottom plate of the housing, and wherein the housing comprises a guide member which is extended from a top surface of the bottom plate of the housing to the guide member of the mid-frame and is coupled to the guide member of the mid-frame.
 21. The touch input device of claim 20, wherein the guide member of the mid-frame has a groove, and wherein the guide member of the housing comprises a protrusion that is insertable into the groove.
 22. The touch input device of claim 20, wherein the guide member of the housing has a groove, and wherein the guide member of the mid-frame comprises a protrusion that is insertable into the groove.
 23. The touch input device of claim 20, further comprising a coupling member which passes through the bottom plate of the housing and the guide member of the housing and is embedded in the guide member of the mid-frame to a predetermined depth.
 24. The touch input device of claim 20, further comprising a coupling member which passes through the guide member of the mid-frame and is embedded in the guide member of the housing to a predetermined depth.
 25. The touch input device of claim 20, wherein the guide member of the housing and the guide member of the mid-frame have a groove, and further comprising a coupling member which is insertable into the groove of the guide member of the housing and the groove of the guide member of the mid-frame.
 26. The touch input device of claim 20, wherein the guide member of the housing and the guide member of the mid-frame have a groove, and further comprising an adhesive agent or an adhesive tape which is disposed in the groove of the guide member of the housing and the groove of the guide member of the mid-frame. 